Index: b/pinentry/pinentry-curses.c
===================================================================
--- b/pinentry/pinentry-curses.c
+++ b/pinentry/pinentry-curses.c
@@ -690,6 +690,8 @@
   return 0;
 }
 
+static FILE *debugfp;
+
 /* XXX Assume that field width is at least > 5.  */
 static void
 dialog_input (dialog_t diag, int alt, int chr)
@@ -702,6 +704,14 @@
     /* Remap alt-backspace to control-W.  */
     chr = 'w' - 'a' + 1;
 
+  if (! debugfp)
+    debugfp = fopen("/tmp/pinentry-curses-output.txt", "w");
+  if (debugfp)
+    {
+      fprintf (debugfp, "%x\n", chr);
+      fflush (debugfp);
+    }
+
   switch (chr)
     {
     case KEY_BACKSPACE: